The Burris BTS35 has built a loyal following among hog and predator hunters looking for a thermal handheld that does not demand a second mortgage, and this review covers the core BTS35 v2 configuration with the 400×300 VOx sensor, the version most hunters encounter first at this price point. Burris also sells a newer BTS35 v3 640 with a 640×300 sensor, and the naming across the line has shifted enough over the years that it is worth confirming exactly which generation and sensor size a listing is describing before you buy. What has not changed across generations is the core appeal, a genuinely compact, weatherproof handheld built around Burris’ BurrisConnect app ecosystem, priced to compete hard against the bigger thermal brands.
Specifications
| Spec | Detail |
|---|---|
| Sensor resolution (v2) | 400×300, 12 micron pixel pitch |
| Sensor resolution (v3 option) | 640×480 available on the v3 640 variant |
| Refresh rate | 50Hz |
| Battery | 1 internal plus 1 hot swappable 18650, 5+ hours combined runtime |
| Waterproof rating | IP67 |
| Recoil rating | 800G |
| Mount | American Defense Mfg QD Picatinny, adjustable cantilever |
| Connectivity | WiFi to BurrisConnect app for photo and video |
| Rangefinder | Stadiametric |
Optical Performance
The 400×300 VOx sensor on the standard BTS35 is not chasing the resolution numbers of premium competitors, and it does not need to at this price. Image clarity is genuinely solid for hog and predator work at realistic ranges, with published detection range figures around 1100 yards for a typical animal sized heat signature under good conditions. As always with thermal detection numbers, that describes spotting a heat source, not confidently identifying species at that distance, and real world recognition range sits considerably closer.
The 50Hz refresh rate keeps moving targets smooth enough for realistic hunting scenarios, coyotes and hogs on the move rather than sprinting game at extended range. Buyers who need to track genuinely fast moving targets at distance, or who want the sharper detail the 640×480 sensor provides, should look specifically for the BTS35 v3 640 rather than the standard model.
Reticle and Controls
Multiple reticle styles and color palette options are available and switch easily through the onboard menu, letting you match the display to whatever background you are hunting against, brush, open field, or structure. The stadiametric rangefinder gives a workable distance estimate without needing a separate laser unit, though as with any stadiametric system it depends on knowing your target’s actual size and is less precise than a dedicated rangefinder.
The BurrisConnect app is where this unit distinguishes itself from cheaper alternatives. WiFi connectivity lets you pull photos and video off the unit without cables, review footage on your phone, and manage settings through a genuinely usable interface. For anyone documenting hunts or reviewing footage afterward to improve their technique, this is a real practical advantage over units that lack app connectivity entirely.
Build Quality and Durability
An IP67 waterproof rating means this unit shrugs off rain and creek crossings without hesitation, a genuine requirement for hog hunting in the wet conditions that often produce the best activity. The 800G recoil rating covers use as a handheld or scanning unit comfortably, and the hot swappable 18650 battery system is a real strength, letting you carry spares and keep hunting through a long night without waiting on a recharge.
The American Defense Mfg mount with its adjustable cantilever is a genuinely well regarded accessory mount in its own right, giving repeatable return to zero if you move the unit between a handheld role and a rail mounted scanning setup.
Who Should Buy This Scope
The standard BTS35 suits a hog or predator hunter who wants a genuinely capable, weatherproof thermal handheld with real app connectivity, without paying for resolution beyond what the hunting distance actually requires. It is a strong value proposition against pricier competitors covered elsewhere on this site.
Buyers who need longer range identification, who hunt more open terrain at extended distance, or who simply want the sharper 640×480 image should confirm they are ordering the v3 640 variant specifically rather than the standard sensor model.
Pros
- Genuinely strong value against pricier thermal handhelds in this category
- IP67 waterproof rating and 800G recoil rating cover real field conditions
- Hot swappable 18650 battery keeps you hunting through long sessions
- BurrisConnect app gives real WiFi photo and video functionality
Cons
- Standard sensor resolution trails premium competitors at extended range
- Naming across v2 and v3 generations and sensor sizes causes genuine listing confusion, so confirm the exact model before ordering
If a genuinely capable, weatherproof thermal handheld with real app support at a competitive price is what you are after, the BTS35 is worth a close look. Take a moment to check the current listing.
Alternatives to Consider
| Alternative | When it’s the better choice |
|---|---|
| Pulsar Axion 2 XG35 | You want a more established handheld with wider accessory support |
| AGM Rattler V2 | You want a more compact handheld for backpack carry |
| InfiRay RICO Mk2 | You want a rail mounted scope rather than a handheld and need a built in rangefinder |
Frequently Asked Questions
What is the difference between the BTS35 v2 and v3?
The v2 uses a 400×300 sensor while the v3 lineup adds a 640×480 sensor option in the BTS35 v3 640, delivering sharper image detail at a higher price. Confirm which generation and sensor size a specific listing describes before buying.
Is the Burris BTS35 waterproof?
Yes, it carries an IP67 rating, meaning it withstands rain and brief water exposure without issue, a genuinely useful feature for hog hunting in wet conditions.
How long does the battery last?
Burris states over 5 hours combined runtime between the internal battery and one hot swappable 18650 cell. Carrying spare 18650 batteries extends a hunting session indefinitely.
Does the BTS35 work as a handheld or does it need to be rail mounted?
It functions primarily as a handheld thermal monocular, though the included American Defense Mfg mount allows rail mounting for scanning use as well.
Verdict
The Burris BTS35 delivers genuine value in the thermal handheld category, backed by real app connectivity, solid weatherproofing, and a battery system built for long sessions in the field. For hog and predator hunters who do not need extended range identification, the standard sensor model is a smart, budget conscious choice, while those wanting sharper image detail should step up specifically to the v3 640 variant.
See Also: Trijicon REAP-IR Review
I’m Jake, a dedicated shooter and hunter who has spent years testing rifles, scopes, and gear in the field. I write from real experience, sharing what truly works, not what’s trendy. My goal is to give you honest, practical insights that help you make the right choices for your adventures and pursuits.
